610212c Betula nana subsp. exilis (Sukaczev) Hultén
Distribution
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Frequent
Kharaulakh: Frequent
Yana - Kolyma: Scattered
West Chukotka: Frequent
South Chukotka: Rare
East Chukotka: Frequent
Western Alaska: Frequent
Northern Alaska - Yukon: Frequent
Central Canada: Scattered
Hudson Bay - Labrador: Rare
Mid Arctic Tundra: Rare
Southern Arcti Tundra: Scattered
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
2n=
28 30? (2x). - Siberia (N), Far East (N), Alaska, Canada. - Several reports.
Not included: Reports of 2n = 42 from northwestern Alaska (Johnson and Packer 1968) and West Chukotka (Zhukova and Petrovsky 1975). Both are probably based on some hybrids. However, the count of Zhukova and Petrovsky was made on "the same voucher" as a 2n = 28 count.
Geography: Asian (NE) - amphi-Beringian - North American (N): SIB RFE ALA CAN.
Notes: Vassiljev (1966) described Betula perfiljevii as a strictly Beringian species (from Kolyma and Kamtchatka east to south-central Alaska) enclosed within the larger range of B. nana subsp. exilis. We include it fully in that subspecies.
Higher Taxa
- Betula nana [610212,species]